Added type coloring to the index

Opting to use sass to generate the basic type classes
API now returns a string which contains the stypes of the Pokemon
used specifically to generate a gradient that is defined in sass
Updated all images to be the same size so they layout the same

Need:

Set the title of the pokemon and the index of the pokemon better within
the now created frame

Use the gradient on all the subsequent pages
Restrict the size of the pokemon in the evolution view
Updated evolution and battle views to use new pokemon card
Better evolution event names for pokemon
Merge branch 'revised-index'